<!DOCTYPE html>
<html>
  <head>
    <script src="https://cdn.jsdelivr.net/npm/effector@0.18.2/effector.umd.js"></script>
  </head>
  <body>
    <script>
      const header = document.createElement('h1')
      document.body.appendChild(header)
      const $text = effector.createStore('hello')
      $text.watch(str => (header.innerHTML = str))
    </script>
  </body>
</html>
